尼洋河流域水化学特征及其控制因素

发布时间：2019-03-07 19:40

【摘要】：为研究尼洋河流域水化学特征及其控制因素,2014年先后采集河水7组,井水13组,泉水10组,共计30组水样.综合运用数理统计、Piper三线图、Gibbs模型和离子比等方法,分析了尼洋河流域河水、泉水和井水的水文地球化学特征,并探讨了尼洋河流域的水化学演化规律.结果表明,河水、井水及泉水中阳离子均以Ca~(2+)、Mg~(2+)为主,占阳离子总量的84%以上;阴离子以HCO_3~-和SO_4~(2-)为主,占阴离子总量的97%以上;TDS介于79.11~290.48 mg·L~(-1)之间,平均值为165.21 mg·L~(-1),矿化度较低;水化学类型以HCO_3·SO_4(SO_4·HCO_3)-Ca·Mg(Mg·Ca)型水为主;水化学样品均分布在Gibbs模型左中部,说明该流域水化学离子组成受岩石风化作用控制;主成分分析及相关分析表明,尼洋河流域水化学组分受硅酸盐岩的溶解控制,碳酸盐岩的溶解也起到非常重要的作用.
[Abstract]:In order to study the hydrochemical characteristics and control factors of Niyang River Basin, 7 groups of river water, 13 groups of well water and 10 groups of spring water were collected in 2014, and 30 groups of water samples were collected. The hydrogeochemical characteristics of river water, spring water and well water in the Niyang River basin are analyzed by means of mathematical statistics, Piper three-line diagram, Gibbs model and ion ratio, and the hydrochemical evolution law of the Niyang River basin is also discussed. The results showed that Ca~ (2), Mg~ (2), HCO_3~- and SO_4~ (2 -) were the main cations in river water, well water and spring water, accounting for more than 84% of the total cation, and the anions were mainly HCO_3~- and SO_4~ (2 -), accounting for more than 97% of the total anion content. TDS is between 79.11 mg 路L ~ (- 1) and 290.48 mg 路L ~ (- 1), the average value is 165.21 mg 路L ~ (- 1), the salinity is lower, and the hydrochemical type is HCO_ 3 路SO _ 4 (SO_ 4 路HCO _ 3)-Ca Mg (Mg 路Ca water, the main type is HCO_ 3 路SO _ 4 (SO_ 4 路HCO _ 3)-Ca Mg (Mg 路Ca. The hydrochemical samples are distributed in the middle left of the Gibbs model, indicating that the hydrochemical ion composition in the basin is controlled by rock weathering. The principal component analysis and correlation analysis show that the hydrochemical composition of Niyang River basin is controlled by the dissolution of silicate rock, and the dissolution of carbonate rock also plays a very important role.
【作者单位】：中国地质调查局水文地质环境地质调查中心;
【基金】：中国地质调查局地质调查项目(12120114059601,DD20160298)
【分类号】：X52

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